Move app state banner to the very top (#8706)

This moves the banners to the root composable and so eliminates the need to
track the app states in every screen.

app/src/main/java/eu/kanade/tachiyomi/ui/updates/UpdatesScreenModel.kt

@@ -11,7 +11,6 @@ import cafe.adriel.voyager.core.model.coroutineScope
 import eu.kanade.core.prefs.asState
 import eu.kanade.core.util.addOrRemove
 import eu.kanade.core.util.insertSeparators
-import eu.kanade.domain.base.BasePreferences
 import eu.kanade.domain.chapter.interactor.GetChapter
 import eu.kanade.domain.chapter.interactor.SetReadStatus
 import eu.kanade.domain.chapter.interactor.UpdateChapter
@@ -62,16 +61,12 @@ class UpdatesScreenModel(
     private val getChapter: GetChapter = Injekt.get(),
     private val libraryPreferences: LibraryPreferences = Injekt.get(),
     val snackbarHostState: SnackbarHostState = SnackbarHostState(),
-    basePreferences: BasePreferences = Injekt.get(),
     uiPreferences: UiPreferences = Injekt.get(),
 ) : StateScreenModel<UpdatesState>(UpdatesState()) {
 
     private val _events: Channel<Event> = Channel(Int.MAX_VALUE)
     val events: Flow<Event> = _events.receiveAsFlow()
 
-    val isDownloadOnly: Boolean by basePreferences.downloadedOnly().asState(coroutineScope)
-    val isIncognitoMode: Boolean by basePreferences.incognitoMode().asState(coroutineScope)
-
     val lastUpdated by libraryPreferences.libraryUpdateLastTimestamp().asState(coroutineScope)
 
     val relativeTime: Int by uiPreferences.relativeTime().asState(coroutineScope)

app/src/main/java/eu/kanade/tachiyomi/ui/updates/UpdatesTab.kt

@@ -56,8 +56,6 @@ object UpdatesTab : Tab {
         UpdateScreen(
             state = state,
             snackbarHostState = screenModel.snackbarHostState,
-            incognitoMode = screenModel.isIncognitoMode,
-            downloadedOnlyMode = screenModel.isDownloadOnly,
             lastUpdated = screenModel.lastUpdated,
             relativeTime = screenModel.relativeTime,
             onClickCover = { item -> navigator.push(MangaScreen(item.update.mangaId)) },